Manufacturing device of electric wire with terminal and manufacturing method of electric wire with terminal

A terminal crimping device is used to manufacture an electric wire with terminal by crimping a terminal fitting onto an end portion of an electric wire. This device includes: an electric wire holding portion to hold the end portion of the electric wire at a predetermined crimping position; a terminal crimping portion to crimp the terminal fitting onto the end portion of the electric wire at the crimping position; and a crimping portion moving mechanism to move the terminal crimping portion along a crimping portion moving direction. The terminal crimping portion is provided to be movable with respect to the end portion of the electric wire held at the crimping position by the electric wire holding portion along the crimping portion moving direction that intersects with a direction along which the end portion of the electric wire extends.